// 索引类型

interface IndexLanguage {
  [index: number]: string
}
const frontLanguage: IndexLanguage = {
  0: 'html',
  1: 'css',
  2: 'js',
}

interface indexYear {
  [name: string]: number
}

const languageYear: indexYear = {
  'c': 1999,
  'java': 1992
}

// 函数类型

interface CalcFn {

}

export { }